<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport"
    content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
  <script>
    //   try {
    //     console.log(msg)
    //   } catch (err) {
    //     console.log(err)
    //   }
    //   console.log('44')

    // try-catch 让我们的js代码更加健壮，不会影响后续代码的执行
    async function xxx() {
      try {
        const res = await axios({
          url: 'http://ajax-api.itheima.net/api/books/999',
        })
        console.log(res)
      } catch (err) {
        console.log('err333', err)
      }

      console.log(666)
    }
    xxx()
  </script>
</body>

</html>